Q 1 :    

Arrange the following in the ascending order of wavelength:

A. Gamma rays (${\lambda }_1$)

B. x-rays (${\lambda }_2$)

C. Infrared waves (${\lambda }_3$)

D. Microwaves (${\lambda }_4$)

Choose the most appropriate answer from the options given below         [2024]

• ${\lambda }_4<{\lambda }_3<{\lambda }_1<{\lambda }_2$

   

• ${\lambda }_2<{\lambda }_1<{\lambda }_4<{\lambda }_3$

   

• ${\lambda }_4<{\lambda }_3<{\lambda }_2<{\lambda }_1$

   

• ${\lambda }_1<{\lambda }_2<{\lambda }_3<{\lambda }_4$

   

Q 2 :    

Match List-I with List-II:

	List-I (EM-Wave)		List-II (Wavelength Range)
A	Infra-red	(I)	${10}^{-3}$nm
B	Ultraviolet	(II)	400 nm to 1 nm
C	X-rays	(III)	1 mm to 700 nm
D	Gamma rays	(IV)	1 nm to ${10}^{-3}$ nm

 

Choose the correct answer from the options give below                 [2024]

• (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

   

• (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

   

• (A)-(III), (B)-(II), (C)-(IV), (D)-(I)

   

• (A)-(II), (B)-(I), (C)-(IV), (D)-(III)

   

Q 3 :    

Match List-I with List-II

	List-I (EM-Wave)		List-II (Wavelength Range)
A.	Infra-red	(I)	${10}^{–3}$ nm
B.	Ultraviolet	(II)	400 nm to 1 nm
C.	X-rays	(III)	1 nm to 700 nm
D.	Gamma rays	(IV)	1 nm to ${10}^{–3}$ nm

Choose the correct answer from the options given below:          [2025]

• (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

   

• (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

   

• (A)-(III), (B)-(II), (C)-(IV), (D)-(I)

   

• (A)-(II), (B)-(I), (C)-(IV), (D)-(III)

   

Q 4 :    

Answer the following in the ascending order of wavelength ($\lambda$)

(A) Microwaves (${\lambda }_1$)                          (B) Ultraviolet rays (${\lambda }_2$)

(C) Infrared rays (${\lambda }_3$)                         (D) X-rays (${\lambda }_4$)

Choose the most appropriate answer from the options given below:          [2025]

• ${\lambda }_4<{\lambda }_3<{\lambda }_2<{\lambda }_1$

   

• ${\lambda }_3<{\lambda }_4<{\lambda }_2<{\lambda }_1$

   

• ${\lambda }_4<{\lambda }_2<{\lambda }_3<{\lambda }_1$

   

• ${\lambda }_4<{\lambda }_3<{\lambda }_1<{\lambda }_2$

   

Q 5 :    

Given below are two statements: One is lavelled as Assertion (A) and other is labelled as Reason (R).

Assertion (A) : Electromagnetic waves carry energy but not momentum.

Reason (R) : Mass of a photon is zero.

In the light of the above statements, choose the most appropriate answer from the options giben below:          [2025]

• (A) is true but (R) is false.

   

• (A) is false but (R) is true.

   

• Both (A) and (R) are true but (R) is not the correct explanation of (A).

   

• Both (A) and (R) are true and (R) is the correct explanation of (A).

   

Q 6 :    

If an optical medium possesses a relative permeability of $\frac{10}{\pi }$ and relative permittivity of $\frac{1}{0.0885}$, then the velocity of light is greater in vacuum than that in this medium by _______ times. (${\mu }_0=4\pi \times {10}^{–7}\mathrm{H}/\mathrm{m}, {\in }_0=8.85\times {10}^{–12}\mathrm{F}/\mathrm{m}, c=3\times {10}^8\mathrm{m}/\mathrm{s}$)          [2025]